谷幅收缩作用下特高拱坝真实变形特性及影响因素分析  

Analysis of Real Deformation Characteristics and Influencing Factors of Ultra-high Arch Dam Under Action of Valley Shrinkage

作　　者：柴东 程恒[1] 毛延翩 张国新[1,3] 杨波 周秋景[1] 刘毅[1,3] CHAI Dong;CHENG Heng;MAO Yan-pian;ZHANG Guo-xin;YANG Bo;ZHOU Qiu-jing;LIU Yi(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Xiluodu Power Plant Three Gorges Jinsha Jiangchuan Yunshui Hydropower Development Co.,Ltd.,Yongshan 657300,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Beijing 100038,China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]三峡金沙江川云水电开发有限公司永善溪洛渡电厂,云南永善657300 [3]流域水循环模拟与调控国家重点实验室,北京100038

出　　处：《水电能源科学》2022年第11期107-110,共4页Water Resources and Power

基　　金：流域水循环模拟与调控国家重点实验室自主研究课题(SKL2020ZY10);中国长江三峡集团有限公司科研项目(412002002,XLD/2114)。

摘　　要：为分析谷幅收缩作用下拱坝的真实变形特性,基于监测数据,采用有限元方法,反演得到了拱坝-地基模型边界位移分布,在此基础上,单独考虑谷幅收缩、坝面水压、温度、库盆水压等荷载作用,对拱坝蓄水运行期进行仿真计算,解析各单一因素影响下拱坝变形的变化规律,揭示各影响因素对大坝变形的影响权重。结果表明,在高水位下,谷幅变形、坝面水压、温度荷载、库盆水压对大坝径向变形的影响权重分别为43%、40%、16%、1%;在低水位下,谷幅变形、坝面水压、温度荷载、库盆水压对大坝径向变形的影响权重分别为63%、17%、19%、1%。在谷幅收缩作用下,低水位时坝体向上游变形最大。In order to analyze the real deformation characteristics of arch dam under the action of valley shrinkage, based on the monitoring data, the boundary displacement distribution of arch-foundation model was obtained using the finite element method. On this basis, the impoundment operation period of arch dam was simulated considering the load effects such as valley shrinkage, dam surface water pressure, temperature, and reservoir basin water pressure. And then the variation law of arch dam deformation was analyzed under the influence of each single factor, and the influence weight of each influencing factor on the dam deformation was discussed. The results show that under the high water level, the influence weights of valley shrinkage, dam surface water pressure, temperature load and reservoir basin water pressure on the radial deformation of dam are 43%,40%,16% and 1%,respectively. Under the low water level, the influence weights of valley shrinkage, dam surface water pressure, temperature load and reservoir basin water pressure on the radial deformation of dam are 63%,17%,19% and 1%, respectively. Under the action of the valley shrinkage, the deformation of the dam along the upstream is the largest at the low water level.

关 键 词：谷幅收缩 特高拱坝 变形 边界加位移 

分 类 号：TV311[水利工程—水工结构工程]